Spark-arrester.



PATENTED APR. 23, 1907.

C S. GHALPANT. SPARK ARRESTER.

APPLICATION FILED APR.3, 190s.

WITNESSES WAZO m: rvonms PETERS co., wasmucrgu, n. c.

Unrfrnn snares PATENT ()FFIGE.

COTTER STRAW N CHALFANT, OF EL PASO, TEXAS.

SPARK-ARRESTER.

Application filed April 3,

To all whom it may concern:

Be it known that I, COTTER STRAWN Cunn- FANT, a citizen of the United States, and a resident of El Paso, in the county of El laso and State of Texas, have invented a .new and Improved SparkAr.rester, of which the following is a full, clear, and exact description.

This invention is an improvement in spark arresters and has, among other objects, to provide a device of this character which will enforce the economical consumption ol l'uel, eliminate danger and discomfort caused by escaping sparks and einders, and increase the efficiency of the locomotive by dispensing With the usual obstructing screens, nettings, etc. detrimental to good steaming qualities.

Another object is to provide a spark arrester which will not choke the draught in the smoke box and thereby cause the blowing of smoke and fire out through the lire box door into the cab; a condition to be contended With in the operation of certain forms of spark arresters hitherto devised.

The above objects are acconmlished by my invention, one embodiment of which is hereinafter disclosed.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation, partly in see tion, of my improvement as applied to a l0comotive; Fig. 2 is a front sectional elevation on the line 22 of Fig. 1, looking in the direction of the arrow, and Fig. 3 is a section on the line 33 of Fig. 2, lookingin the directi On of the arrow.

Before proceeding to describe the invention in detail, the principle thereol will be stated. It is well known that if a mixed stream of gaseous and solid material, the latter being in a finely divided state, he introduced into a curved pipe, the solid particles will tend to collect against and follow along the outer wall thereof. Now, if suitable openings are provided along this wall oi the pipe for the escape of the solid partic les, they will, by virtue of their momei'itum and the pressure of the gases behind them, pass with a portion of the same through the openings and flow for a considerable distance into any suitable duct provided for their collee tion. This principle has been adopted in carrying out my invention, which may generally be stated to consist of a curved smoke Specification of Letters Patent.

1906. Serial No. 309,698.

Patented April 23, 1907.

stack extending through the smoke box of the engine to within a shortdistance of a properly directed exhaust pipe, said smoke stack having suitable openings surrounded by a casing forming a spark chamber and roinlucting the sparks to the ash pan or "lire box, preferably the latter.

stack as applied to an ordinary form of locomotive, said stack passing through the smoke box and terminating at its lower end in a llaring or funnel end 2, suitably supported by a bracket 3 or other form of supporting means. The upper end of the stack above the smoke box is curved in a reverse direction at t, in order that the exhaust may be discharged in a perpendicular direction, as in the case ol a straight smoke stack.

Adjacent to the funnel end 2 01" the smoke stack, and in alincnlent therewith. supported by suitable brackets 5 and 5, is a conical pipe 6, which I term a petticoat pipe, having a funnel or llaring end similar to and extending inv the same direction as the funnel end 2 of the smoke stack 1 The pipe 6 and funnel end 2 are separated a slight distance for a purpose hereinafter made apparent.

Directed to the center of the petticoat pipe 6 is an upwardly extending exhaust pipe having a curved nozzle 7, separated a slight distance from said pipe. Surrounding the smoke stack 1 at the outward hall of its curve, and extending from its lower end to a point preferably above the smoke stack, is a casing 8 ecccntrieally arranged, forming a spark chamberenlarged at one side and tapering downwardly to a point at the lower end of the stack, as best shown in Figs. 1 and 2. The side oi the stack enclosed by the casing has cut therein a series of spiral slots or openings 9, provided with overhanging downwardly inclined deflector plates 10 at their upper edge, said slots and dellector plates forming traps for the sparks and cinders. The deflector plates project into the stack and are preferably made integral therewith by cutting the metal forming the slots 9 at the bottom and side edges only and bending it back into the stack opening. At the upper end ol the enlarged side of the spark chamber a cinder pipe 11 leads back to the ash pan or [ire box, following the curve of the boiler and provider-l near the point of its conneetion with the spark chamber with a conl strictcd pass controlled by a damper 12 The numeral 1 indicates a curved smoke IuO I. fire.

adapted to be regulated by a handle 13 upon the exterior. This pass is for the purpose of checking excessive flowof the exhaust gases.

The operation of the device is as follows: Then the locomotive is exhausting, the exhaust is conducted through the nozzle 7 and forced through the petticoat pipe 6 up the stack, carrying with it cinders and sparks drawn in by the draught caused thereby. The cinders, sparks and other solid particles will hug the front wall of the stack and will be deflected by the plates 10 through the slots 9 together with a small percentage of the gaseous portion of the exhaust; and by reason of their momentum and pressure behind will pass up the spark chamber 8 through the pipe 11 preferably to the fire box where they will be consumed by the Any sparks which fail to pass in the pipe 11 will drop back to the lower end of the spark chamber, and if not arrested in their descent by a subsequent exhaust, will fall out through the lower opening in the engine stack, thereby keeping the spark chamber clear and open at all times.

The inclined arrangement of the slots 9 and deflector plates 10 forming the traps, centrifugally throws the solid particles to the enlarged side of the spark chamber and into alinement with the spark pi e: I/Vith certain classes of fuel it may be found desirable to change the inclination of the traps, and in some cases to make them substantially horizontal. The sparks in passing from the spark chamber to the spark pipe, will, by the centrifugal action, follow the outer curve of the pipe and permit the constricted portion controlled by the damper 12 to be so regulated as to eliminate a large percentage of the exhaust gases. The casing forming the spark chamber is preferably constructed to be easily removed in order that the traps may be repaired or for other necessary purposes.

The precise embodiment of my invention is not material, provided its essential characteristics are employed as pointed out in the annexed claims.

Having thus described my invention I claim as new and desire to secure by Letters Patent:

1. In a spark arrester, the combination of a reversely curved smoke stack having a flaring lower end, a conical pipe having a flaring end adjacent thereto and in alinement therewith, traps for the sparks formed by inclined slots and deflector plates at the outer side of the stack, a casing eccentrically surrounding the traps, and a spark pipe connected to the upper end of the casing for the purpose described.

2. In a spark arrester, the combination of a curved smoke stack, a spark chamber eccentrically connected to the outward curved portion thereof, means carried by the stack adjacent to the chamber for separating the sparks or-cinders and discharging them therein, and means connected to the chamber for conducting the sparks to the fire box.

3. In 'a spark arrester, the combination of a curved smoke stack having a flared lower end, a conical pipe adjacent thereto and in alinement therewith having a flared end, a spark chamber eccentrically surrounding the outward curved portion of the stack, means carried by the stack adjacent to the chamber for separating the sparks and discharging them therein, and a pipe connected to the upper end of the chamber, having an adjustable constricted pass for the purpose described.

4. In a spark arrester, the combination of a reversely curved smoke stack extending into a smoke box a spark chamber eccentrically carried at the outward curved portion thereof, means carried by the stack for separating the sparks and discharging them into the chamber, and a pipe connect ing the upper end of the chamber, having a constricted pass and conducting the sparks to the fire box.

5. I11 a spark arrester, in combination, a curved smoke-stack having a series of openings and passing therethrough at the outer curved side thereof whereby as cinders and other solid particles are forced up the stack they will hug said outer curved side and pass through said openings on their upward movement.

6. In a spark arrester, in combination, a curved smoke-stack having openings therein at the outer curved side thereof, and a casing connected to the stack surrounding said open ings and forming a spark chamber whereby as cinders and other solid particles are forced up the stack they will hug said outer curved side and pass through said openings on their upward movement to said spark chamber.

7. In a spark arrester, in combination, a curved smoke-stack having openings therein at the outer curved side thereof, deflector plates over the openings, and a casing con nected to the stack surrounding said openings and forming a spark chamber whereby as cinders and other solid particles are forced up the stack they will hug said outer curved side and be deflected by said plates on their upward movement through the openings into said spark chamber.

8. In an engine, a smoke-box, an exhaust nozzle therein, and a curved smoke-stack passing into the smoke-box in close proximity to the nozzle, said stack having openings therein at the outer curved side thereof whereby as cinders and other solid particles are forced by the nozzle through the stack, they will hug said outer curved side and pass through said openings.

9. In an engine, a smoke-box, an exhaust nozzle therein, a curved smoke-stack passing into the smoke-box in close proximity to the In testimony whereof I have signed my nozzle, said stack having openings therein at name to this specification in the presence of 10 the outer curved side thereof, and deflector two subscribing witnesses.

plates over the openin s whereby as cinders w r r u r and other solid particles are forced through (JOlrlER SLRAWVN CHALIAN the stack by the nozzle, they will hug said Witnesses: outer curved side and will be deflected by R. C. HEMPIIILL, said plates through said openings. WV. H. WVINTER. 

